8G Science HW#10: Chapter 1.3 and 1.4

A reaction that absorbs energy in the form of heat is called ______.

• Exothermic reaction

• Endothermic reaction

• Chemical Reaction

• Chemical Bonding

A reaction that releases energy in the form of heat is called ______.

• Exothermic reaction

• Endothermic reaction

• Chemical Reaction

• Chemical Bonding

The minimum amount of energy needed to get a chemical reaction started is called _______.

• Activation energy

• Concentration

• Catalyst

• Enzyme

The amount of one material in a certain volume of another material is called _______.

• Activation energy

• Concentration

• Catalyst

• Enzyme

A material that increases the rate of a chemical reaction by lowering the activation energy is called _______.

• Activation energy

• Concentration

• Catalyst

• Enzyme

A biological catalyst that lowers the activation energy of reaction in cells is called _______.

• Activation energy

• Concentration

• Catalyst

• Enzyme

A material that decreases the rate of a reaction is called ______.

• Catalyst

• Inhibitor

• Combustion

• Fuel

A rapid reaction between oxygen and fuel that results in fire is called ______.

• Catalyst

• Inhibitor

• Combustion

• Fuel

A material that releases energy when it burns is called ______.

• Heat

• Temperature

• Combustion

• Fuel

True or False

Water stops combustion by keeping the fuel from coming in contact with fire.

• True

• False